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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2025
Fair Value Disclosures [Abstract] |
Categorization of Investments and Assets and Liabilities Measured at Fair Value on Recurring Basis | The following table presents the categorization of investments and certain other financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2025 and 2024:
| December 31, 2025
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |
Debt Securities Carried by EGL | $ | 486,641 |  |  | $ | — |  |  | $ | — |  |  | $ | 486,641 |
Other Debt and Equity Securities(1) | 901,266 |  |  | — |  |  | — |  |  | 901,266 |
Investment Funds | 175,418 |  |  | — |  |  | — |  |  | 175,418 |
Total Assets Measured At Fair Value | $ | 1,563,325 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,563,325 |
Liabilities: |  |  |  |  |  |  |
Contingent Consideration Liability(2) | $ | — |  |  | $ | — |  |  | $ | 24,521 |  |  | $ | 24,521 |
Total Liabilities Measured at Fair Value | $ | — |  |  | $ | — |  |  | $ | 24,521 |  |  | $ | 24,521 |
| December 31, 2024
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |
Debt Securities Carried by EGL | $ | 459,916 |  |  | $ | — |  |  | $ | — |  |  | $ | 459,916 |
Other Debt and Equity Securities(1) | 824,069 |  |  | — |  |  | — |  |  | 824,069 |
Investment Funds | 178,703 |  |  | — |  |  | — |  |  | 178,703 |
Total Assets Measured At Fair Value | $ | 1,462,688 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,462,688 |
(1)Includes $23,108 and $9,967 of U.S. Treasury securities classified within Cash and Cash Equivalents on the Consolidated Statements of Financial Condition as of December 31, 2025 and 2024, respectively. (2)The contingent consideration liability is initially recorded at fair value on the acquisition date and is included within Other Long-term Liabilities on the Company's Consolidated Statement of Financial Condition. The fair value of the contingent consideration liability is remeasured at each reporting period using the probability-weighted expected return method. The inputs used to derive the fair value of the contingent consideration include the application of probabilities when assessing certain performance thresholds for the relevant periods. Any change in the fair value is recognized in Other Operating Expenses on the Company's Consolidated Statement of Operations. There was no change in the fair value of this liability from acquisition to December 31, 2025.
Carrying Amount and Estimated Fair Value of Financial Instrument Assets and Liabilities which are Not Measured at Fair Value | The carrying amount and estimated fair value of the Company's financial instrument assets and liabilities, which are not measured at fair value on the Consolidated Statements of Financial Condition, are listed in the tables below.
|  |  | December 31, 2025
| Carrying |  | Estimated Fair Value
| Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets: |  |  |  |  |  |  |  |  |
Cash and Cash Equivalents(1) | $ | 1,402,912 |  |  | $ | 1,402,912 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,402,912 |
Certificates of Deposit | 40,421 |  |  | — |  |  | 40,421 |  |  | — |  |  | 40,421 |
Receivables(2) | 685,665 |  |  | — |  |  | 680,998 |  |  | — |  |  | 680,998 |
Contract Assets(3) | 175,349 |  |  | — |  |  | 173,097 |  |  | — |  |  | 173,097 |
Closely-held Equity Securities | 1,673 |  |  | — |  |  | — |  |  | 1,673 |  |  | 1,673 |
Financial Liabilities: |  |  |  |  |  |  |  |  |
Accounts Payable and Accrued Expenses | $ | 44,562 |  |  | $ | — |  |  | $ | 44,562 |  |  | $ | — |  |  | $ | 44,562 |
Payable to Employees and Related Parties | 181,591 |  |  | — |  |  | 181,591 |  |  | — |  |  | 181,591 |
Notes Payable(4) | 588,224 |  |  | — |  |  | 575,879 |  |  | — |  |  | 575,879 |
|  |  | December 31, 2024
| Carrying |  | Estimated Fair Value
| Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets: |  |  |  |  |  |  |  |  |
Cash and Cash Equivalents(1) | $ | 863,078 |  |  | $ | 863,078 |  |  | $ | — |  |  | $ | — |  |  | $ | 863,078 |
Certificates of Deposit | 66,660 |  |  | — |  |  | 66,660 |  |  | — |  |  | 66,660 |
Receivables(2) | 522,816 |  |  | — |  |  | 518,485 |  |  | — |  |  | 518,485 |
Contract Assets(3) | 76,856 |  |  | — |  |  | 76,184 |  |  | — |  |  | 76,184 |
Closely-held Equity Securities | 625 |  |  | — |  |  | — |  |  | 625 |  |  | 625 |
Financial Liabilities: |  |  |  |  |  |  |  |  |
Accounts Payable and Accrued Expenses | $ | 29,041 |  |  | $ | — |  |  | $ | 29,041 |  |  | $ | — |  |  | $ | 29,041 |
Payable to Employees and Related Parties | 48,494 |  |  | — |  |  | 48,494 |  |  | — |  |  | 48,494 |
Notes Payable(4) | 373,895 |  |  | — |  |  | 356,531 |  |  | — |  |  | 356,531 |
(1)Excludes $23,108 and $9,967 of U.S. Treasury securities classified within Cash and Cash Equivalents on the Consolidated Statements of Financial Condition as of December 31, 2025 and 2024, respectively. (2)Includes Accounts Receivable, as well as long-term receivables, which are included in Other Assets on the Consolidated Statements of Financial Condition. (3)Includes current and long-term contract assets included in Other Current Assets and Other Assets on the Consolidated Statements of Financial Condition. (4)Includes current and long-term Notes Payable included in Current Portion of Notes Payable and Notes Payable on the Consolidated Statements of Financial Condition.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-13 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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